These are ORIGINAL WINCHESTER small-caliber magazine tubes taken from .25 WCF .25-.20, .32 WCF .32-.20 and .218 Bee - Winchester 1873, 1892, 52 and Marlin lever-action rifles in models 1873 and 1892 rifle. This tube is 23 9/16 inches long with an OUTSIDE DIAMETER of approximately .518 inches with a hole drilled through both walls in the Forearm magazine plug screw. They will fit the Winchester model 1892 in .25-.20 (.25 WCF) and .32-.20 (.32 WCF) and .218 Bee calibers. It fits the 1873 .32-.20 cartridges and Winchester model 52. This is also the magazine tube Marlin 1894, 1889, 1894 early and 1893. The MAGAZINE SPRING that goes in this tube is part number ms92 (it comes with instructions on what length the spring should be cut to in relation to the length of your tube). Barrels that are 24 inches use the 23 9/16 inch tube. Please contact us for a custom-length used magazine.